Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/178—Syringes
  • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/178—Syringes
  • A61M5/31—Details
  • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
  • A61M5/3202—Devices for protection of the needle before use, e.g. caps
  • A61M5/3204—Needle cap remover, i.e. devices to dislodge protection cover from needle or needle hub, e.g. deshielding devices
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/178—Syringes
  • A61M5/28—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/178—Syringes
  • A61M5/31—Details
  • A61M5/3129—Syringe barrels
  • A61M5/3137—Specially designed finger grip means, e.g. for easy manipulation of the syringe rod
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/178—Syringes
  • A61M5/31—Details
  • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
  • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
  • A61M5/321—Means for protection against accidental injuries by used needles
  • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/178—Syringes
  • A61M5/31—Details
  • A61M5/3129—Syringe barrels
  • A61M5/3137—Specially designed finger grip means, e.g. for easy manipulation of the syringe rod
  • A61M2005/3139—Finger grips not integrally formed with the syringe barrel, e.g. using adapter with finger grips
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/178—Syringes
  • A61M5/31—Details
  • A61M5/3129—Syringe barrels
  • A61M2005/3142—Modular constructions, e.g. supplied in separate pieces to be assembled by end-user
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/178—Syringes
  • A61M5/31—Details
  • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
  • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
  • A61M5/321—Means for protection against accidental injuries by used needles
  • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
  • A61M5/3245—Constructional features thereof, e.g. to improve manipulation or functioning
  • A61M2005/3246—Constructional features thereof, e.g. to improve manipulation or functioning being squeezably deformable for locking or unlocking purposes, e.g. with elliptical cross-section
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M2205/00—General characteristics of the apparatus
  • A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
  • A61M2205/586—Ergonomic details therefor, e.g. specific ergonomics for left or right-handed users
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M2205/00—General characteristics of the apparatus
  • A61M2205/59—Aesthetic features, e.g. distraction means to prevent fears of child patients

Definitions

• a shell for receiving an injection system comprising a syringe received
• the present invention relates to a shell for receiving an injection system comprising a syringe received in a safety device.
• the invention further relates to a safety system for a syringe which comprises a safety device and such a shell, and to a syringe system comprising a syringe and such a safety system.
• Some illnesses such as multiple sclerosis or arthritis, necessitate that a drug be injected into a patient regularly, such as every day or every week.
• the drug is available under the form of prefilled drug delivery devices, such as prefilled syringes.
• the patient is trained to self injection and is capable to proceed to the injection of the drug by himself. Nevertheless, injection systems are provided to make injection easier for the patient.
• injections systems are generally satisfactory, they do not always meet all of the user's expectations. In particular, they may be fairly difficult to use for some patients, for example those having deformed hands. Moreover, while injections systems aim at reducing the patient's apprehension, the needle may still be visible, which may frighten some patients.
• the invention relates to a shell for receiving an injection system comprising a syringe received in a safety device, the safety device having a body configured to receive the syringe, and a shield movable relative to the body and capable of covering at least part of a syringe needle, at least one finger flange extending outwardly from the body or the safety shield.
• the shell extends along a longitudinal axis and comprises:
• - a housing which is substantially tubular and configured to receive at least a distal portion of the safety device
• the casing comprises:
• the distal end of a component or apparatus must be understood as meaning the end furthest from the hand of the user and the proximal end must be understood as meaning the end closest to the hand of the user, with reference to the injection device intended to be used with said component or apparatus.
• the distal direction must be understood as the direction of injection with reference to the injection device, and the proximal direction is the opposite direction.
• the injection system is housed in an outer shell which is easier to manipulate, even for a patient with deformed hands.
• the shell is configured to receive the injection system, it has larger dimensions than said injection system, and is therefore easier to grab and to handle.
• the shell is an outer component which is not directly into contact with the syringe, contrary to the safety system, there are fewer limitations on its shape, which can be appropriately designed to be easier to handle.
• the shell according to the invention makes it possible to hide the syringe needle so as to lower the patient's apprehension.
• the safety device is required to be transparent to enable visual inspection of the syringe received in the safety device, and of the syringe content. This means that, even if the syringe needle does not extend beyond the safety device distal end, said needle can be seen through the safety device.
• the injection system can be inserted into the shell after visual inspection, which means that the shell is not required to be transparent. Providing an outer opaque shell makes it possible to hide the needle from the patient's view without preventing the preliminary visual inspection step.
• Another significant advantage of the invention is that the injection system is very satisfactorily maintained in the shell. More specifically, owing to the snap features and protrusion(s), the shell is configured:
• the snap features can be used to secure the finger flange in the mounted position, i.e. to secure axially the safety device inside the shell and prevent it from being uncoupled from the shell.
• the protrusion its aim is to tighten the safety device against the shell, preferably substantially orthogonally to the axis, substantially without exerting a compression force likely to damage the safety device.
• the injection system insertion is facilitated.
• the injection system can be inserted until the finger flanges are located distally from the snap features, and axially facing the protrusion.
• the shell is made as one single piece.
• the shell can be made by injection of a plastic material, such as ABS (acrylonitrile butadiene styrene) or a copolymer ABS - PC (polycarbonate).
• a plastic material such as ABS (acrylonitrile butadiene styrene) or a copolymer ABS - PC (polycarbonate).
• the casing, snap features and protrusion(s) can be made as one single piece.
• the snap feature may have a distal face, preferably orthogonal to the shell axis. This distal face may be configured to form an abutment for securing the finger flange in the mounted position.
• the snap feature may further have a proximal face, preferably a sloped proximal face for facilitating insertion of the safety device in the shell.
• the protrusion may have a holding face configured to push the finger flange inwardly.
• the holding face may be located distally from the snap feature proximal face.
• the holding face may extend along a direction secant to the snap feature distal face.
• the protrusion may further have a proximal face, preferably a sloped proximal face for facilitating insertion of the safety device in the shell.
• proximal face of the protrusion is not necessarily sloped; in particular this is not necessary if the proximal face of the snap feature is located proximally from the proximal face of the protrusion and is sloped.
• each protrusion can protrude distally from one snap feature, thereby forming a single tab with the snap feature, the tab being configured:
• Said tab can extend longitudinally.
• One wall of the casing may comprise a slot which substantially has the shape of a U having two legs extending longitudinally and a base orthogonal to the shell axis, the area of the casing wall located inside the slot forming said tab.
• the base may be located at the distal part of the slot.
• the line joining the ends of the legs not connected to the base is preferably located at the proximal part of the slot. Said line may form a hinge allowing the tab to be deformed or to pivot outwardly.
• the protrusion can extend distally from the snap feature and from the tab, partly in the slot base.
• the shell can comprise two protrusions each arranged on one lateral wall of the casing, the protrusions being opposed relative to the axis along a lateral direction.
• Said lateral wall is the portion of the peripheral wall of the casing which is parallel to the lateral direction along which the finger flanges of the safety device shield extend.
• the casing may comprise two half-casings located on both sides of said transverse plane, and the shell can comprise at least one protrusion on one lateral wall of each half-casing.
• protrusion pushes the finger flange against the opposite lateral wall of the half-casing.
• the shell may comprise one protrusion on each one of the opposed lateral walls of the casing, for example on each one of the opposed lateral walls of each half-casing, i.e. four protrusions.
• the protrusions allow tightening the finger flange between them, which helps balancing the safety system.
• the shell can comprise one protrusion on one transverse wall of each half-casing, i.e. two protrusions.
• Said transverse wall is the portion of the peripheral wall of the casing which is orthogonal to the lateral direction along which the finger flanges of the safety device shield extend. Therefore, the protrusions are in contact with the lateral ends of the finger flanges.
• the casing may form an enlarged portion of the shell with respect to the housing, said enlarged portion extending in a lateral direction. Such a configuration may help improving the easy handling of the shell. In particular, a user may place his/her fingers on the distal face of said enlarged portion.
• the shell may further comprise a distal end provided with an inner compartment configured to receive a cap remover. The cap remover can be used to remove a cap mounted on the syringe distal end for covering the needle before pricking.
• the shell may further comprise at least four, and preferably six, ribs inside the housing, the ribs being configured to centre the safety in the shell.
• the shell may further comprise at least one insertion stop, preferably two insertion stops, configured to form a distal abutment for the injection system in the mounted position.
• the insertion stop may be formed by an extension portion of one rib in the casing, configured so that the finger flange can abut on said insertion stop in the mounted position.
• the invention relates to a safety system for a syringe, comprising:
• a safety device having a body configured to receive the syringe, and a shield movable relative to the body and capable of covering a syringe needle, the shield having finger flanges which extend laterally adjacent to a proximal end of the shield;
• the safety device being mounted in the shell, the finger flanges of the safety device shield being maintained relative to the shell by the snap feature and protrusion.
• the invention relates to a syringe system comprising a safety system as previously described, and a syringe inserted in the body of the safety device, the syringe comprising a needle.
• the shell may have a length such that, in the mounted position, the needle exceeds the distal end of the shell of a pre-determined length.
• the shell may have an adjustable length such that, in the mounted position, the needle length exposure from the distal end of the shell can be controlled.
• the maximum pricking depth in the patient's skin may vary.
• the shell length is chosen accordingly to obtain the required and predetermined needle length beyond the shell distal end.
• the needle may extend beyond the shell distal end by a distance in the range of 0,4 to 0,7 mm.
• the invention relates to a shell for receiving an injection system including a syringe received in a safety device.
• the safety device includes a body configured to receive the syringe, a shield movable relative to the body and configured to cover at least part of a syringe needle, and at least one finger flange extending outwardly from the body or the safety shield.
• the shell extends along a longitudinal axis and includes a housing which is substantially tubular and configured to receive at least a distal portion of the safety device and a casing configured to receive the finger flange of the safety device.
• the casing includes at least two snap features configured to flex outwardly during insertion of the finger flange in the casing so that the finger flange is insertable distally from a distal face of the snap feature, and a protrusion located distally from each snap feature distal face.
• the protrusion is configured to exert an inward biasing force on the finger flange once the finger flange is inserted distally from the distal face of the snap feature.
• the invention relates to a safety system for a syringe, including a safety device having a body configured to receive the syringe, and a shield movable relative to the body and configured to cover a syringe needle, the shield having finger flanges which extend laterally adjacent to a proximal end of the shield.
• the safety system further includes a shell as described herein, the safety device mounted in the shell, the finger flanges of the safety device shield maintained relative to the shell by the snap feature and the protrusion.
• the invention relates to a syringe system including a safety device having a body configured to receive the syringe, and a shield movable relative to the body and configured to cover a syringe needle, the shield having finger flanges which extend laterally adjacent to a proximal end of the shield.
• the safety system further includes a shell as described herein, the safety device mounted in the shell, the finger flanges of the safety device shield maintained relative to the shell by the snap feature and the protrusion.
• the syringe system further includes a syringe inserted in the body of the safety device, the syringe comprising a needle.
• Figure 1 shows an embodiment of a syringe system according to the invention
• Figure 2 is an exploded view of an injection system which can be inserted in a shell according to the invention to form a syringe system;
• FIG. 3 shows the injection system before use
• Figure 4 shows the injection system once injection is completed and the system has been removed from the injection site
• Figure 5 is an enlarged view of detail A of Figure 1;
• Figure 6 is a perspective top view of the syringe system of Figure 1;
• Figure 7 is a detailed view of the shell showing a snap feature and a protrusion
• Figure 8 is a cross section of the safety system showing the protrusions tightening one finger flange of the safety device shield
• Figure 9 is a perspective partial view of the safety system
• Figure 10 is a cross section of the safety system along plane P9 of figure 9;
• Figure 11 is a perspective partial view of the safety system
• Figure 12 is a cross section of the safety system along plane Pll of figure 11;
• Figure 13 is a perspective view of the safety system
• Figure 14 is a cross section of the safety system along plane P13 of figure 13;
• Figure 15 an enlarged view of detail B of Figure 14;
• Figures 16a-16c schematically illustrates successive configurations of the syringe system during insertion of the injection system into the shell;
• Figure 17 is a cross section of the syringe system, showing centring ribs
• Figure 18 is another cross section of the syringe system, showing an insertion stop.
• Figure 1 shows a syringe system 100 which comprises an injection system 101 and a shell 50 for receiving the injection system 100.
• the injection system 101 includes a syringe 10 and a safety device 103.
• the syringe 10 comprises a barrel 11 - preferably having a proximal outer flange 12 - a plunger rod 13 and a needle 14.
• a cap 15 may further be provided to cover the needle 14 before use, to avoid injuries and contamination.
• the cap 15 may be removably mounted on the proximal end of the barrel 11.
• the plunger rod 13 may further comprise a proximal member 16 pushed by a user's finger to perform injection, which can be disc-shaped.
• the safety device 103 is configured to receive the syringe 10.
• the safety device 103 comprises:
• a shield 30 movable relative to the body 20 and capable of covering at least part of the syringe needle 14;
• the finger flanges 31 which extend laterally adjacent to a proximal end of the shield 30 or to a proximal end of the body 20.
• the finger flanges 31 have a distal face 34.
• the shell 50 and safety device 103 form a safety system 102 for the syringe 10.
• the syringe system 100 comprises the safety system 102 and the syringe 10.
• the shell extends along an axis 105.
• the syringe system 100 and its constitutive parts have the same axis 105.
• Longitudinal direction Z is defined as the direction of axis 105.
• the terms "distally” and “proximally” are used with reference to said longitudinal direction Z.
• Lateral direction X is defined as a direction orthogonal to axis 105 and as being the general direction along which the finger flanges 31 of the shield 30 extend.
• the transverse direction Y is defined as the direction orthogonal to the longitudinal direction Z and to the lateral direction X.
• the syringe system 100 may have one or two axes of symmetry, namely a lateral plane PI parallel to (X,Z) and/or a transverse plane P2 parallel to (Y,Z).
• FIG. 1 A non limiting example of an injection system 101 is illustrated in figures 2, 3 and 4, and can be at least partially similar to the system described in WO 2013/159059, the disclosure of which is hereby incorporated by reference in its entirety.
• the syringe 10 is received in a tubular portion 23 of the body 20 and is secured in the mounted position by appropriate means, such as fasteners 21 projecting inwardly at the proximal part of the body 20.
• the flange 12 of the barrel 11 may be snapped between said fasteners and a wall 22 of the body 20 which extends orthogonally to axis 105 and which is located distally from the fasteners 21.
• the shield 30 preferably comprises a tubular portion 33 which receives the body 20.
• the shield 30 can move axially relative to the body 20.
• the body 20 is maintained in position relative to the shield 30, against the action of a spring 45, for example by means of at least one clamp 32 which can cooperate with the fasteners 21 or another part of the body 20 (see figure 5).
• the needle 14 may extend beyond the distal end of the safety device 103 before use.
• the clamp 32 or other retaining member is released. This can be achieved by the action of the plunger rod 13, for example of the proximal member 16, which can cause the fasteners 21 to be freed from the clamps 32.
• the spring 45 causes the shield 30 to move distally relative to the body 20, thereby covering at least part of the needle 14, as shown in figure 4.
• the needle 14 may be covered by the shield 30 before use of the injection system 101.
• the shield 30 moves proximally relative to the body against the actin of the spring 45, so that the needle 14 can extend beyond the shield distal end.
• the spring 45 causes the shield 30 to move distally relative to the body 20, thereby covering at least part of the needle 14.
• the shell 50 comprises a housing 51 which is substantially tubular and configured to receive a distal portion of the safety device 103.
• the shell 50 further comprises a casing 52 configured to receive the finger flange 31 of the safety device.
• the casing 52 can form an enlarged portion of the shell 50 with respect to the housing 51, said enlarged portion extending in the lateral direction X.
• the casing can be located at the proximal part of the shell 50.
• the casing 52 may comprise two half-casings located on both sides of transverse plane P2.
• the casing 52 can have a distal face 53, preferably substantially orthogonal to axis 105, and a peripheral wall including two opposed lateral walls 54, preferably extending parallel to PI and one transverse wall 55, preferably extending parallel to P2.
• the junctions between one lateral wall 54 and the transverse wall 55 is curved, the casing 52 thus having a substantially U-shaped cross section.
• the proximal end of the casing 52 is open.
• the shell 50 can substantially have the shape of a T, when viewed along the transverse direction Y. This makes handling of the shell 50 easier, as the user can place his/her fingers on the distal face 53 of the casing 52.
• the housing 51 may have two opposed lateral recesses 56 located distally from the casing 52, so that grasping the shell 50 is made even easier for the user.
• the distal end 57 of the shell 50 may be provided with an inner compartment 58 configured to receive a cap remover (not shown), and/or with an outer collar 59 allowing improving the proper positioning of the syringe system 100 on the injection site.
• the casing 52 comprises:
• the snap feature 60 may act as an axial abutment which prevents the safety device 103 from moving proximally relative to the shell 50 and ultimately from being uncoupled from the shell 50;
• each protrusion 70 projects inwardly.
• Each protrusion is configured to tighten the safety device 103 against the shell 50, so as to prevent - or at least limit - shaking of the safety device 103 inside the shell 50.
• the protrusions can push the finger flange of the safety device towards or against the shell for limiting or preventing a movement of the safety device relative to the shell.
• the shell 50 comprises one set of one snap feature 60 and one protrusion 70 on each one of the opposed lateral walls 54 of the casing 52, i.e. four of such sets.
• the shell 50 comprises one set of one snap feature 60 and one protrusion 70 on each one of the opposed lateral walls 54 of the casing 52, i.e. four of such sets.
• other implementations could be envisaged provided they make it possible to provide satisfactory holding of the safety device 103 inside the shell 50.
• each lateral wall 54 of the casing 52 comprises a slot 41 which substantially has the shape of a U having two legs 42 extending longitudinally and a base 43 orthogonal to the shell axis 105.
• the area of the casing wall 54 located inside the slot 41 forms said tab 40.
• the tab 40 can be substantially rectangular and can extend longitudinally.
• the base 43 of the slot 41 may be located at the distal part of the slot 41, while the line 44 joining the ends of the legs 42 which are not connected to the base 43 may preferably be located at the proximal part of the slot 41. Said line 44 may form a hinge allowing the tab 40 to be deformed or to pivot outwardly.
• the snap feature 60 can have a distal face 61 preferably orthogonal to the shell axis 105, which can be configured to form an abutment for securing the finger flange 31 in the mounted position.
• the snap feature 60 can further have a proximal face 62, preferably sloped for facilitating insertion of the safety device 103 in the shell 50.
• the protrusion 70 can have a holding face 71, preferably substantially longitudinal in a rest position or in the mounted position of the safety device 103 in the shell 50.
• the holding face 71 may be configured to push the finger flange 31 inwardly.
• the holding face 71 may be located distally from the distal face 61.
• the protrusion 70 can have a proximal face 72, preferably sloped for facilitating insertion of the safety device 103 in the shell 50.
• the holding face 71 can be configured so as to increase the gripping effect on the finger flange 31.
• the holding face 71 may have a specific surface condition (such as micro-reliefs), or may be covered by a thin film of an appropriate material, such as a thermoplastic elastomer (TPE) or a thermoplastic polyurethane (TPU).
• TPE thermoplastic elastomer
• TPU thermoplastic polyurethane
• the protrusion 70 may extend distally from the snap feature 60, and preferably also distally from the tab, partly in the slot base 43.
• One casing 52 and corresponding snap feature(s) 60, protrusion(s) 70 and possible tab(s) 40 can be made as one single piece.
• the whole shell 50 can be made as one single piece.
• the process used can be injection of a plastic material, such as ABS (acrylonitrile butadiene styrene) or a copolymer ABS - PC (polycarbonate).
• the syringe 10 preferably prefilled, is mounted in the safety device 103 to form the injection system 101. Then, the injection system 101 is inserted into the shell 50 up to the mounted position.
• the finger flange 31 is located distally from the distal face of the snap feature 62, and secured in the mounted position owing to the distal face 61 of the snap feature 60, as shown in figure 16c.
• the distance D70 between the holding faces 71 of the protrusions 70, along direction Y, at rest, is smaller than the transverse dimension L31 of the finger flanges 31 (see figure 16b)
• the protrusions 70 exert an inward biasing force on the finger flanges 31.
• each of the facing protrusions 70 pushes the finger flange 31 of the safety device shield 30 towards the other protrusion 70.
• the finger flange 31 is thus tightened between the protrusions 70, which limits or even prevents a movement of the safety device 103 relative to the shell 50.
• the protrusions 70 act as anti-vibration dampers for preventing the safety device 103 from shaking inside the shell 50.
• the snap feature 60 is also flexed outwardly during insertion of the injection system 101.
• the length of the snap feature 60 - orthogonally to the tab 40, i.e. along the transverse direction Y in the exemplary embodiment - can be fairly great without hampering the insertion movement, in particular when the finger flange 31 comes into contact with the snap feature 60.
• Such a greater length of the snap feature 60 is advantageous as it provides a more efficient abutment for retaining the safety device 103 snapped inside the shell 50.
• the shell 50 may further comprise ribs 80 for centring the safety device 103 in the shell 50, preferably both during insertion and in the mounted position.
• ribs 80 can be seen in figure 17, which is a cross section of the syringe system 100 in a plane orthogonal to axis 105, at the level of the lateral recesses 56 of the housing 51.
• the ribs 80 may extend over part or all of the inner face of the housing 50.
• the ribs 80 may project orthogonally inwardly from the inner face of the housing 50. They may contact or be located very close to the outer face of the tubular portion 33 of the shield 30.
• the shell 50 may comprise at least four ribs 80, and preferably six ribs 80, namely: two facing ribs 80a arranged on opposed transverse walls of the housing 50; and two sets of facing ribs 80b, 80c arranged on opposed lateral walls of the housing 50.
• the shell 50 can be provided with an insertion stop 81 configured to form an abutment for the injection system 101 in the mounted position, and to prevent said injection system 101 to further move distally relative to the shell 50 from said mounted position.
• the insertion stop 81 also allows controlling the appropriate mounted position. For that purpose, the insertion stop 81 can be adjusted or changed.
• insertion stops 81 may be provided two insertion stops 81, preferably arranged opposite to one another relative to axis 105.
• the insertion stop 81 can project inwardly from the distal face 53 of the casing 52, and can be configured to cooperate with the finger flanges 31.
• the insertion stop 81 may be formed in the continuity of one rib 80a, in plane PI.
• the needle 14 can extend beyond the distal end 57 of the shell 50 of a pre determined length.
• the needle is covered by the cap 15, which cap 15 can be covered by a cap remover as previously described.
• the invention makes the injection system 101 easier and less traumatic to use.
• the invention ensures that the safety device 103 is not damaged by its movements, and limits or prevents noises related to the shaking, which is detrimental to the perceived quality of the syringe system 100.
• the invention is of course not limited to the embodiments described above as examples, but encompasses all technical equivalents and alternatives of the means described as well as combinations thereof.

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• 2019
  • 2019-03-15 US US16/981,081 patent/US20210016017A1/en active Pending
  • 2019-03-15 CA CA3090357A patent/CA3090357A1/en active Pending
  • 2019-03-15 EP EP19709969.0A patent/EP3768358A1/de active Pending
  • 2019-03-15 JP JP2020545781A patent/JP7341153B2/ja active Active
  • 2019-03-15 CN CN201980015179.9A patent/CN111770770B/zh active Active
  • 2019-03-15 WO PCT/EP2019/056583 patent/WO2019179895A1/en unknown
  • 2019-03-15 KR KR1020207029485A patent/KR102655988B1/ko active IP Right Grant

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